The one that works on my console, obviously. Though only having a passing interest in racing simulators I'm not really in the market.

Maybe one day, pick up a used copy.

Forza 3.

I never cared for GT nor did I care about Forza... But Forza is here now and looks fabulous.
GT is somewhere...out there...

Also, I don't own a PS3 yet and even when I buy one, I wont be buying another steering wheel.

gt5, although il be picking up forza later on.

easy. GT5

Forza. it looks amazing and i dont have a PS3 yet

When I watched the Forza video I was like WOW Xbox 360 produces some realistic graphics. Then I saw GT5 and caught myself questioning true realism in the video. HOLY COW! Both look fantastic, but GT5 hands down. I don't own an xbox, so maybe I'm biased.

Forza 3, but I am seriously considering to buy a PS3 when GT5 releases.

I give it Forza 3 for the controller, I just hate the stupid shape of PS3s R2 and L2 buttons.

And no way I am going to use the X button to accelerate neither do I invest in a steering wheel.

If i could only get one, it would be GT5 hands down. But i'll end up with both games, both look amazing, and i'm a sucker for racing and sim games xD
I just hope we can get an alternate racing scheme for forza 3, since i hate the R2 and L2 acceleration and braking system, and i don't yet know if the G27 will have 360 compatibility.

Dirt 2.

Even watching forza/gt5 makes me sleepy.

Well don't get me wrong, I think Forza 3 will be a great game. But I don't think it can reach to the level of Gran Turismo. Important thing to take in consideration, GT5 was in development for like a zilion years, it had bigger team of ppl working on it and Kazunori Yamauchi is the biggest car enthusiasist in the world, they even have their own racing team... Forza will be great game, but I GT5 will be lifestyle.